I found the original design on OnShape. It is from Eric Jones. It seems to be designed for 3d printing since it doesn't need any supports. If anyone knows if this design was published for 3d printing anywhere please let me know so I can give the appropriate credits.

My redesign (the green one on the photos) is ‘a bit’ more simplistic. You will not be able to use a charge cable with it, but it fit my needs. And if it fits mine the chance is it will fit someone else also. And if you need the charge cable you can use the original design.

Print it with any material you want, and with any settings you want. I used a variable layer height, 0.4 mm nozzle and PLA.

And don't be fooled by the features of the downloads. The original design is twice as tall as my design and needs almost 3 times as much filament at default settings in Prusa Slicer.